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CORSAIR RM850e vs ESGAMING SFX 500W / Mini ITX/Micro ATX

Updated August 2026The CORSAIR RM850e is the superior choice for high-performance needs, while the ESGAMING SFX 500W is a budget-friendly option for basic builds.

The CORSAIR RM850e is the superior choice for high-performance needs, while the ESGAMING SFX 500W is a budget-friendly option for basic builds.

Why CORSAIR RM850e is better

Power Output

850W vs 500W

Modular Design

Fully modular vs non-modular

Certification

Intel ATX 3.1 certified vs no specific certification

Why ESGAMING SFX 500W / Mini ITX/Micro ATX is better

Price

C$54.99 vs C$184.99

Size

Compact SFX form factor

Basic Features

Adequate for entry-level builds

Overall score

CORSAIR RM850e
85
ESGAMING SFX 500W / Mini ITX/Micro ATX
60

Specifications

SpecCORSAIR RM850eESGAMING SFX 500W / Mini ITX/Micro ATX
BrandCorsairESGAMING
Fan Size120mm80mm
ProtectionStandardHeavy-duty
Connector TypeFully ModularPartially Modular
Efficiency Rating80 PLUS Gold80 PLUS Bronze

Dimension comparison

CORSAIR RM850eESGAMING SFX 500W / Mini ITX/Micro ATX

Price Comparison

When it comes to pricing, the CORSAIR RM850e is significantly more expensive than the ESGAMING SFX 500W, priced at C$184.99 compared to C$54.99. This difference of C$130 reflects the distinct capabilities and target markets of each power supply. The RM850e targets users who require a high-performance solution suitable for demanding systems, while the ESGAMING SFX 500W is aimed at budget-conscious consumers or those with less power-intensive builds. The price point of the ESGAMING model makes it an attractive option for entry-level builds or smaller form factor systems.

Power Output and Efficiency

The CORSAIR RM850e boasts a robust output of 850W, which is more than sufficient for high-performance gaming rigs and workstations that require significant power for graphics cards and CPUs. In comparison, the ESGAMING SFX 500W offers a maximum output of 500W, which may limit its usability for more powerful components. The higher output of the RM850e allows it to support high-end GPUs, making it an ideal choice for gamers and professionals who demand performance. The ESGAMING's lower wattage is adequate for basic gaming setups or office computers but may struggle under heavier loads.

Modular Design

The modular design of the CORSAIR RM850e is a notable advantage over the ESGAMING SFX 500W. The RM850e features fully modular cabling, allowing users to connect only the cables necessary for their system builds. This not only simplifies cable management but also improves airflow within the case. On the other hand, the ESGAMING SFX 500W does not highlight a fully modular design, which could lead to a more cluttered setup. For builders prioritizing aesthetics and airflow, the modularity of the RM850e can be a significant factor.

Certification and Standards

The CORSAIR RM850e is Intel ATX 3.1 certified, ensuring compatibility with the latest standards for power supplies and supporting PCIe 5.1 platforms. This certification indicates that it can handle demanding hardware and transient power excursions, such as those that occur during intense gaming or rendering. In contrast, while the ESGAMING SFX 500W features Active PFC for better efficiency and less energy waste, it does not mention any specific certifications. This could suggest that the RM850e is better suited for future-proofing systems, particularly for those investing in high-performance components.

Noise Levels

In terms of noise levels, the CORSAIR RM850e employs a 120mm rifle bearing fan which maintains low noise even under full load. This design is particularly appealing for users who value a quiet computing environment, especially in gaming or media production scenarios. The ESGAMING SFX 500W features an auto-thermally controlled 80mm fan, which is designed to operate quietly. However, the smaller size of the fan may not provide the same level of noise reduction as the larger fan in the RM850e. Thus, users seeking a silent operation might prefer the CORSAIR model.

Capacitor Quality

The quality of components used in a power supply can greatly influence its reliability. The CORSAIR RM850e is equipped with 105°C-rated capacitors, which provide steady and reliable power along with dependable electrical performance. This high-temperature rating suggests that the RM850e is built to withstand more demanding conditions and has a longer lifespan. The ESGAMING SFX 500W does not specify the quality of its capacitors, making it difficult to assess its longevity and reliability compared to the RM850e. For users who prioritize durability, the higher-rated components in the RM850e could be a decisive factor.

Target Audience

The target audience for these two power supplies differs significantly. The CORSAIR RM850e is designed for users with high-performance needs, such as gamers and professionals working with demanding applications. Its price and features reflect the requirements of a more advanced user base. Conversely, the ESGAMING SFX 500W is aimed at budget-conscious consumers or those building compact systems, such as Mini ITX or Micro ATX setups. The lower price point and adequate power output make it suitable for general use, but it may not satisfy the needs of high-end gamers or power users.

Which should you buy?

The decision between the CORSAIR RM850e and the ESGAMING SFX 500W ultimately hinges on your specific needs. If you are building a high-performance system that requires substantial power and modularity, the CORSAIR RM850e is the clear choice, albeit at a higher price of C$184.99. Its advanced features, certification, and quiet operation justify the investment for enthusiasts and professionals. On the other hand, if you are looking for an affordable power supply for a basic build or a compact system, the ESGAMING SFX 500W at C$54.99 offers a practical solution. Consider your system requirements and budget to determine which power supply best fits your needs.

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CORSAIR RM850e vs ESGAMING SFX 500W / Mini ITX/Micro ATX | versusfinder